Insulation-cutting pliers.



H. A. ADAMS. INSULATION CUTTING PLIEBS. APPLIOATIOH IILBD'HAB.27,1809.

Patented July 19,1910.

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7 0 gl 6 d5 W/TNESSES Haw f INVENTOH HARRY A. ADAMS, OF

EAST HARTFORD, CONNECTICUT.

INSULATION-CUTTING PLIERS.

ace coo.

electric wire. without severing the wire as well as severing the wire when required.

To enable others to understand my invention, reference is had to the accompanying drawings, in which:

Figure 1 represents a broken view of a pair of pliers equipped with my improved insulator cutter. also a sectional view of the wire and end view of the insulating material and manner of removing a section of the same; Fig. 2 is a broken upper plan view of the plier, showing a section of wire and insulating material therein, in the act of cutting a section of the insulating material from the wire; Fig. 3 is a broken reverse view of the pliers opened; Fig. 4 is a section of insulated wire; Fig. 5 is an end elevation of the pliers and sectional view of the wire therein; and Fig. 6 isa transverse sectional view of the cutter sections on line 6 of Fig. 3.

The cutter sections 1 and 2 are removably secured to the plier jaws 3 and at in any convenient manner, or they may be made an integral part thereof. In the present instance they are secured by screws, two of which, 5, are shown at Fig. 2 as securing the upper section, the lower section being secured in the same manner to the lower jaw. The upper members (a 71 and the lower section the side cutters 0 (Z, the side cutters of each section being practically parallel to'each other. e f are the end cutters of the sections and are integral therewith and with the side cutters. These side cutters b (1 have, in connection with their straightcutting edges 9 1 the semi-circular depressions h 2' adapted for scraping exposed portions of wire in order to form a good contact.

j 7: are indented cutting edges oppositely located in the sides (r. 1/ of the upper section adapted to sever the insulation (3 on the wire -7. All of the straigh edges g 1 m n are also cutting edges both for the wire and insulation; but the clearance depressions 0 p Specification of Letters Patent. Application filed March 27, 1909. Serial No. 486,141.

at 1 Fig.

section has the side cutters or' pliers, or-it may be sp Patented July 19, 191 O.

or the sides a c are not, which pressions form a clearance for the insulatfijn when'it projects beyond the cutting edges 9 g 0 remove a section of thejiijsulation and 6 expose the wire in the body thereof, as shown 4, the screw 8 is adjusted to bring the cutting edges of the end cutters e f in contact with the wire as shown at Fig. 5,

which will also locate the angular cutting edges of the upper section a corresponding distance from the straight cutting edges of the lower section as represented by the dot ied circle, representing the wire, shown at *i 1. the insulated wire is laterally inserted in the plicrsas shown at Fig. 2-and within the embrace of the angularly indented cutting edges j is of the upper section, and the straight cutting edges of the lower section. .Thcn,/ by

a slight pressure and circular movement of t e pliers, the insulation is cut down to the wire represented by the lines 1' s, at Fig. 4. Then the liers are turned around and the section It oi longitudinallyand removed by the end cutters as shown at Fig. l. The pliers are then opened and the edges of the semi-circular recess l1. 2' are brought in contact with this exposed section of the wire and are moved laterally back andforth to scrape the wire and thus expose a clean contact surface.

I To remove a section of the insulation at set to bring the cutting edges 9 g in contact with the wire and the insulation is then cut down to the wire by means of these cutting edges, and the severed insulation is either stripped off by a side htand removed by the end cutters as previously explained. The sides ofthe upper and lower sections pass by each other so asto give a shearing cut when the wire itself is severed, for which purpose 100 the screw is turned back to enable the plier. jaws to close sufiiciently to effect such sev-' erance. It will be understood that the wire canloe severed equally as well by any of the cutting edges prevlously described for cut- 9 ting the insulation by simply adjusting the. screw 8.

The semi-circular depression 'urat the end of section 1, can be made fully as large as the diameter of the insulation to avoid any 110 tendency of the severed insulated sect-ions lodging therein.

Vhen the pliers have thus been set, 70

the insulation is split the pliers 5 pressure of the closed opposed cutter sections, each section having side cutting members and an end cutting removably securing said sections to the jaws.

section, each section having end cutting tance between the cutting edges 0 the sectric wire without cutting the wire, for the purpose set forth.

x Having thus described my invention, what 4. In a device of the character described, I claim asliew and desire to secure by Letoppose'd cutter sections, a movable support tersPatent 1stherefor, each section having parallel. cutll 'lhe combination with plier jaws of ting members integral therewl h, the cutting members of one section having cutting in- 3 0 dentations, the cutting members of the opposite section having straight'cutting edges, each section having end cutting members integral therewith, the cuttingmembers of each section adapted to eifect a shearing cut, 35 they rear portion ofone of the straight edge cutting members cut away to form a clearance for the insulation, and a screw for ad- 'usting the distance between the cutting edges of the sectionsso as to cut the insula- 40 tion of an electric wire without cutting the wire, for the purpose set forth.

Signed at lfiast Hartford in thecounty of Hartford and State of Connecticut this 12 day of March, A. D. 1909.

HARRY AQADAMSJ sidecutting members and an end cutting member integral therewith.

2. The combination with plier jaws,of opv osed cutter sections, each section having member integral therewith, and meansfor 3. In a device'ofthe character described, opposed cutter sections, movable supports therefor, each section having parallel side cutting members, the side cutting members of one section having indented cutting edges ada ted to have a shearing cut with the straight cutting members of the opposite members, and a screw for a'dmstin .the disa Witnesses:

JESSIE S. Goonwm, LAURA GLA'ZIER.

tions so as-to cut the insulation of an elec- 

